Air bound siphon flush tank



H. D. MOISE AIR BOUND SIPHON FLUSH TANK Filed Jan. 9, 1929 Oct. 6, 193i.

Ime/nto@ Maf Patented Oct. 6, 1931 UNITED sin-.TESg

PATENT OFFICE HARMON D. MOISE, F SUI/ITER, SOUTH CAROLINA, ASSIGNOR '110MICHAEL B. CROSS, OF EUTAWVILLE, SOUTH CAROLINA, .AND` RAYMON SCHWARTZ,W. YATES YEADON, SOPHIA BRUNSON, AND MARION W. SEABROOK, OF SUMTER,SOUTH CAROLINA am BOUND simon FLUSH TANK Appncatior. sied January 9,1929. lserial No. 331,218.

This invention relates to air bound siphon iush tanks and especially tothe provision of means for insuring the recharging of the air chamberautomatically after each flush.

5i Heretofore this has not been satisfactorily accomplished and the airbound siphon flush der pressure) was utilized to entrain and conduct airto the air chamber was subject to the same objectionit would becomeobstructed. These two methods were both necessarily limited as to theirpossible maximum bore and hence the obstruction of the bore was all themore likely to occur, quickly. A sub- 1 sidiary Siphon, vpositionedwithin the bell eX- tending below it slightly, and discharging into the'main discharge pipe was also used for the same purpose heretofore,namely by lowering the liquid contents of the flush tank below thebottom of the bell to thus allow the recharging of the air chamber aftereach iiush. This also would become obstructed and proved objectionablein other respects. By the present invention a force is utilized (whichforce is generated bythe downward pull of the liquid being discharged)to energize a. spring or lift a weight or compress a gas or in any othermanner to store up energy. This energy pulls the bell downwardly duringthe latter part of the flush, thus becoming stored up in the actuatingdevice of whatever nature, and when the siphon breaks after dischargingthe contents of the flush tank this stored energy immediatelyraises orlifts the bell to a higher level than it occupied when the flush endedand thus the bell being above the level of the liquid in the flush tankthe air chamber recharges itself with air.

Although in an air bound siphon iiush tank the liquid contents aredischarged to an extent by the mere force of gravity, yet, after theliquid content of the flush tank has been.:

lowered to the level of the top of the discharge pipe and continuouslythereafter until the siphon breaks, the bell becomes a inember of asiphon and the liquid is lifted in the bell up to a sufficient height tobe discharged into the discharge pipe by siphonic action within thebell. A downward pull is generated A(by this siphonic action) upon thebell and it is this force which is stored up in` a spring or itsequivalent, which is utilized to pull the bell downwardly a limitedpredetermined distance'to store up force enough to again raise the bellto its normal elevation after the siphon breaks. In the accompanyingdrawings springs only are shown as the energy storing means, but anyother suitable 'agent may be employed to receive the energy and upon thebreaking of the siphon to lift the bell up again to the level itoccupied before it was pulled down from its normal position. In case of,automatic operation, the bell must be heavy enough not to float duringthe'opera'tion of the apparatus. operation this limitation does notapply.

rThis invention is illustrated in the accompanying drawings, in which Y'Fig l is a sectional view of the tank,

siphon, bell and springs, the lowered positiony of the bell being shownin dotted lines.

Fig. 2 is a fragmentary view of a nonautomatic form of thisdevice.

Referring to Fig; l, A is the flush tank; B is t-he bell; C is thedischarge pipe ofthe Siphon; D is the sewer; F is iin in the bell B; GGare the walls of the tank; H is the manhole ring; I is the manholecover; J is the floor of the tank; LL is the automatic flushing level ofthe liquid; KK is Athe level of the liquid when theV energy storingdownward pull on bell B begins; MM is the lowest position of the mouthof the bell B; N is the water supply valve; O is the top level of theliquid seal; P is the maximum vertical height attainable by O; and EEare springs.

The operation of the apparatus thus described is as follows: The Hushtank becoming filled with water from the supp'lyvalve N up' to the levelindicated by line LL auto- (lll matically iushes or discharges itscontents because of the head attained, in the usual manner into thesewer D and in progress of this discharging of the tank the liquid levelfalls therein to the line KK. After this level has been reached all theliquid subsequently discharged must be lifted above the level of theline KK (within the bell) in order to escape through C to D as indicatedby the arrows. This puts into action a downward pull on the bell B,which pull increases as the discharge continues to lower the level ofthe liquid in A outside of B. This downward pull draws the bell downwarduntil the iin F is in contact with the top of C, thus extending thesprings EE and storing energy in them. Vhen the level ofi the liquid inthe tank A has fallen to the line MM then the siphon breaks because someair is drawn into the bell B from the tank A. This ends the action ofdischarging the tank A as the bell B has reached its lowest possibleposition due to the impinging of F upon the top of C. The downward pulldue to the siphonic action within B is now weakened and no longer ableto hold down the bell B against the upward pull of the springs EE whichhave been extended by the downward movement of the bell; hence thesprings litt the bell back. up to its original level as shown in fulllines in Fig. l. leaving the liquid level in the tank at MM below thebottom of the bell B, which now loses all its liouid contents bvgravity. The air chamber within B and C down to O is new automaticallyrecharged with air from the tank A. As the iniiow of liquid from thesupplv N is continuous the same action as described will repeat itselfcontinually.

If it is desired to operate this invention non-automatically theincoming lioui d must not be allowed to reach the level of the line LL,but must be shut oit by some usual or suitable means such as a ballfloat and valve. Such an arrangement is shown in Fi 2. Beferring to saidfigure. when a liush is desired a. lowering of the bell B by pressuretrom above or downward null from below or otherwise will cause thedischarge ont the {iush tank A bv increasing the head of the liquidwithin said flush tank beyond the height of the liquid seal P. as shownin Fig. l, which height P cannot be increased. In Fig. 2 the regulationof the upper liouid level I/L is bv means ota ball iioat Q controlling avalve S in the inlet pipe N: and the downward movement of the bell B totlush is produced bv pressure downwardly on a push rod B.- which ismaintained in its upper or normal position by a spring E', whichperforms all the same functions as the springs E in Fig. l. Otherwisethan in the initial steppt pushing` down on rod It. the operation is thesame and depends on the same principles as before.

Obviously any other suitable mechanical or other means may besubstituted for the mechanism shown, without departing from the scopeand purview of this invention. It is to be understood that allnon-essential modifications and additions to the specil'ic means hereindescribed and illustrated are conteniplated as within the scope of theappended claims. Thus any desired or usual form of overflow may beprovided in Fig. 2. Again, the bell B in Fig. 2 is not necessarily heavyenough to prevent its iioating, as it is held. against flotation by thepin T.

That is claimed is z 1. In an air bound siphon flushing appara tus, amovable bell -forming part of a siphon, and a yieldably resistant meansutilizing the downward pull exerted upon the air bell by the dischargingliquid during the flushing operation to store up energy, and means timedto release said energy to restore the air bell, after the flushingoperation, to its normal position.

2. In an air bound siphon flushing appaatus. a pipe with a dependingliquid seal, a movable bell forming a part ot the siphon and meansutilizing the downward pull exerted upon said bell during the flushingaction to draw the bell downward, means actuated thereby to store upenergy and means thereafter actuated to release said energy and applythe same to restore the bell to its normal position.

3. In an air bound siphon lush tank, a tank, a pipe extending downwardlyout of the tank and turned upwardly to form a liquid seal, said pipealso extending upwardly above the bottom of said tank, a bell positionedover and enclosing the upper part of said pipe within the tank, saidbell being held in normal position by yieldably resistant means whichwill permit of the downward motion of the bell when acted on by siphonicpull and restore the bell to its normal level after the discharge of thetank.

4. In an air bound siphon flush tank, a tank, a pipe extendingdownwardly out of the tank and turned upwardly to form a liquid seal,said pipe also extending upwardly above the bottom of said tank, av bellpositioned. over and enclosingr the upper part of said pipe within thetank, sai d bell being held in normal position by yieldably resistantmeans which will permit of the downward motion oi the bell when acted onby siphonic pull and restore the bell to its normal level after thedischarge of the tank, and means for nonautomatically discharging thetank by downward motion of the bell when the tank contains liquid almostenough to cause flushing automatically.

In testimony whereof I hereunto aiiix my signature.

HARMON D. MOISE.

